Korg Poly800/EX800 Users

You should be AOK in the group. You are not in any naughty bin. At least, not as far as I can tell.

Mike




________________________________
 From: Tavish McDonald <tavishmcronald@...>
To: korgpolyex@yahoogroups.com 
Sent: Tuesday, September 18, 2012 3:38 PM
Subject: Re: [korgpolyex] Re: Just made a trade for a broken poly 800! Problems at first glance!
 

  
Good guess, from what I can tell it turns out they did do exactly that. I turned the board over and found a some wires connecting the jack to where the battery current goes in. Also two capacitors going across the output/headphone jacks, maybe if I cut these the headphone jack will work again. I would post pictures of what I found but I'm having trouble getting into the members only area now? 


On Tue, Sep 18, 2012 at 10:14 AM, bimmerfan222 <bperkins211@...> wrote:

 
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>Hard to tell from the pics, but I wonder if the prev. owner/butcher managed to somehow re-route the external power connection direct to the battery terminals and that's why it powers up when you plug a wallwart into the 9v DC input jack.
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>I think the LED they put in it was perhaps either an activity indicator or they simply didnt have a standard diode to put in.. so they used a LED instead (not a good idea since it gobbles up current).
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>Since it does power up and you have LED display activity, it sure sounds like it's not dead yet and perhaps recoverable.. just going to take time/patience to go thru it and restore it to OEM specs.
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>-Blaine
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>
>--- In korgpolyex@yahoogroups.com, Tavish McDonald <tavishmcronald@...> wrote:
>>
>> Yeah this thing is definitely going to need some work, I thought getting it
>> cleaned up would be a good place to start while I find parts. I have
>> powered it on with an adapter without Q1 somehow, I wonder if the
>> nonfunctional headphone jack has anything to do with this transistor. I
>> have the service manual.
>> 
>> Yes the compartment shows signs of battery leakage.
>> 
>> http://www.sdelectronic.rs/php/elm.php?prm=TR2SB
>> based on this it looks like TR2SB764 is 60v 1a 10w. Is that what I need to
>> know to find a replacement or is there more to it than that? Obviously I
>> don't know much about electronics/transistors.
>> 
>> 
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